<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>wevb</title>
		<script type="text/javascript">
			var n1=2;
			var n2=3;
			var n3=6;
			// alert(n1>n2 && n1<n3);	//一个为true,一个为false,结果为false
			// alert(n1<=n2 && n1<=n3);
			// alert(n1>=n2 && n1>=n3);
			// alert(n1!=n2 || n1>n3);
			// alert(n1<=n2 || n1<=n3);
			// alert(n1>n2||n1>n3);
			alert(! (n1!=n2));
			
		</script>
	</head>
	<body>
		
	</body>
</html>